The US Optics new B-Series of optics provide you with a list of features which is one of the richest on the market. US Optics are built for individuals who demand the most out of their optics. The B-Series features a locking elevation and Windage knob, zero stop and a revolution counter. A Single button illumination control has been integrated into the parallax adjustment knob, all built to the same durability, reliability and performance that US optics is known for. If you have been waiting to jump into the high quality optics market, then do so with the US Optics B-Series and see for yourself the difference.